Study of the physicochemical properties of specialty carbon black and its catalytic performance for the pyrolysis of ammonium perchlorate

Abstract

This work aims at investigating the structure–activity relationship between the physicochemical properties of nine types of carbon black (CB) with a particle size range of 1–15 μm and a mass fraction of 5%, including oil absorption value, compression oil absorption value, and oxygen content, and the catalytic pyrolysis of ammonium perchlorate (AP), concluding that the function relationship between oil absorption value and high-temperature peak is Y1 = 1032.67 − 9.618x + 0.038x², the function relationship between compression oil absorption value and high-temperature peak is Y2 = 145.537 + 62.365 ln(x), and the function relationship between oxygen content and high-temperature peak is Y3 = e^{(6.085−0.02/x)}. Based on these, we further use coal tar, which is abundant in sources, as the raw material to prepare five types of coal-based CB marked as CB1–CB5 at pyrolysis temperatures of 1000 ~ 1800 °C. The relative error between the actual peak value and the predicted value of the CB/AP composite particles is less than 5%, proving that the peak temperature model of CB/AP composite particles can guide actual production. This study contributes to the promotion of CB applications in improving the catalytic pyrolysis performance of ammonium perchlorate and enhancing the high added value utilization of coal-derived products.